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Santa Cruz Substrates – Ride the Wave to Perfect Mycelium

At Santa Cruz Substrates, we don’t just mix dirt—we craft the ultimate launchpad for your mycelium to shred. Whether you’re a rookie cultivator or a seasoned pro, our blends are tuned like a perfect point break—balanced, clean, and totally dialed-in.

1. CocoVerm (5lb bag)

A classic never goes out of style. Our OMRI-listed coconut coir and OMRI-listed vermiculite are blended like yin and yang, then hydrated to the perfect field capacity with crisp, mineral-rich Santa Cruz Mountain water. Light, airy, and moisture-balanced—your mycelium will drop in and carve through this substrate like a hot knife through butter.

2. 50/50 Santa Cruz Mountain Horse Blend (5lb bag)

This is the heavy hitter—our locally-sourced horse manure composted to absolute perfection, paired with OMRI-listed coco coir and vermiculite. Hydrated with that same clean mountain water, this mix packs a nutrient punch that’ll have your mycelium charging full throttle. If CocoVerm is the cruiser board, this is the big-wave gun.

3. CocoVerm + MycoFuel (5lb bag)

For the cultivator who wants to turbocharge their grow, we take our signature CocoVerm and boost it with MycoFuel—our proprietary, science-backed additive designed to help mycelium colonize faster, recover stronger, and fruit heavier, even in gnarly conditions. Pasteurized, hydrated, and locked in—this is performance substrate for the pros.

🌊 From the forest to your fruiting room, every bag is prepped with care, science, and a little Santa Cruz soul.
Whether you’re after the smooth glide of CocoVerm, the nutrient swell of 50/50 Horse Blend, or the rocket fuel of MycoFuel mix, we’ve got the substrate to keep your grow stoked from start to flush.

Local pickup only in Santa Cruz County.
100 lb minimum order.

Email to place your order and let’s get growing.